These carts permit the kids to "play" as they feel in their mind once they grab hold of them. And they're OFF!! Unless you have the rare dainty little proper girl there to buy her tea and cookies, most kids feel it's a fun thing, and thats when the excitement gets out of hand. Especially if you have more than one child and it becomes a game somehow. The item itself encourages the challenge and the problems that come with it. No carts, no play, no additional discipline to worry about. I'd rather be doing what I need to be, shopping, and get out of there. Now if they want to assign an area for them to use them, that would be another thing. Although who's going to go watch them?